If you are looking for a fun and unique effect this card in bottle is great.
Imagine taking out a bottle and pouring some soda out of it and placing it to the side.
Have a spectator select a card and return it into the deck. You go to look for the card and you notice something in the bottle. It's the SELECTED CARD INSIDE the bottle!
This is really strong and a wonderful change from just finding the card.
Easy to do and Great to perform.